Games like Skirmish
Games like Skirmish include The Bazaar, Thronefall, Kingdom Rush - Tower Defense, Company of Heroes 3, and Plants vs. Zombies GOTY Edition. We matched them by the tags players give Skirmish on Steam (Card Battler, Action RTS, Strategy, Real Time Tactics, and Auto Battler): closest matches first, and among equally close ones the better-known games.

The Bazaar
Shared: Strategy · Card Battler · Auto Battler

Thronefall
Shared: Strategy · Tower Defense · Action RTS

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Action

Company of Heroes 3
Shared: Strategy · Action RTS · Real Time Tactics

Plants vs. Zombies GOTY Edition
Shared: Strategy · Tower Defense · Casual

Broken Arrow
Shared: Strategy · Action RTS · Real Time Tactics

9 Kings
Shared: Strategy · Auto Battler · Card Battler

Northend Tower Defense
Shared: Strategy · Tower Defense · Action RTS

Total War: WARHAMMER III
Shared: Strategy · Real Time Tactics · RTS

Legion TD 2 - Multiplayer Tower Defense
Shared: Strategy · Tower Defense · Auto Battler

Bloons TD 5
Shared: Strategy · Tower Defense · Action

Backpack Battles
Shared: Strategy · Auto Battler · PvP

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Battler · Strategy · Action

Creeper World 4
Shared: Real Time Tactics · Tower Defense · Strategy

Slay the Spire
Shared: Card Battler · Strategy · Card Game

Door Kickers 2: Task Force North
Shared: Real Time Tactics · Strategy · Action

Line War
Shared: Action RTS · Strategy · Real Time Tactics

Overdungeon
Shared: Strategy · Card Battler · Casual

Kingdom Rush 6: Genesis TD
Shared: Strategy · Tower Defense · Action

Aliens: Dark Descent
Shared: Strategy · Real Time Tactics · Action

Balatro
Shared: Strategy · Card Game · Card Battler

Warhammer Age of Sigmar: Realms of Ruin
Shared: Strategy · Action RTS · Real Time Tactics

Animation Throwdown: The Quest for Cards
Shared: Card Battler · Strategy · Card Game